Industrial Excellence
Bronze Filled PTFE
Goa Polymer manufactures Bronze Filled PTFE in rod, sheet, tube, and custom-machined forms from our ISO 9001:2015 certified facility in Maharashtra, India. With 40–60% bronze powder content, this grade combines PTFE’s low friction and chemical stability with bronze’s high compressive strength, thermal conductivity, and wear resistance — making it the first choice for bearings, bushings, thrust washers, piston rings, and hydraulic seals under sustained mechanical load.
40% or 60% (by weight)
–180°C to +240°C
Service Temperature
3 mm – 100 mm
Up to 150 MPa (60% bronze grade)
ISO 9001:2015 | MSME Registered
What Is Bronze Filled PTFE?
Bronze Filled PTFE is produced by uniformly blending bronze powder (typically 40% or 60% by weight) into a PTFE matrix before sintering. The bronze particles form a load-bearing network within the soft PTFE, increasing compressive strength and thermal conductivity while the PTFE binder maintains low friction and prevents metal-to-metal contact between the part and its mating surface.
The result is a material that can carry loads three to five times higher than virgin PTFE, dissipates heat from the bearing surface faster, and resists deformation under sustained compression — the three main failure modes of plain PTFE in bearing and sealing applications. At Goa Polymer, Bronze Filled PTFE is sintered and machined in-house, with dimensional checks on all finished parts before dispatch.
Key Features & Benefits
High Compressive Strength
Compressive strength up to 150 MPa (60% grade) — three to five times higher than virgin PTFE. Handles sustained bolt loads, press-fit assembly, and high bearing pressures without permanent deformation.
Superior Thermal Conductivity
Thermal conductivity 3–5× higher than virgin PTFE. Bronze particles conduct frictional heat away from the bearing surface, reducing operating temperature and extending component life in high-speed or high-load applications.
Low Friction — Self-Lubricating
Coefficient of friction of 0.10–0.20 (dry). Operates without oil or grease in clean environments. The PTFE matrix continuously transfers a thin film to the mating surface, preventing galling and reducing wear on both parts.
Reduced Creep vs Virgin PTFE
Bronze reinforcement significantly reduces cold flow under sustained compressive load — the primary failure mode of plain PTFE bearings and thrust washers. Components maintain their press-fit and dimensional accuracy longer.
Excellent Machinability
Bronze Filled PTFE machines cleanly on CNC lathes and mills. Turns, bores, and threads to tight tolerances (±0.05 mm achievable) without burring — producing finished bearings and bushings directly from rod or tube stock.
Dimensionally Stable
Lower coefficient of thermal expansion than virgin PTFE. Components maintain press-fit and running clearances across a wider operating temperature range — important for precision bearing housings and piston assemblies.
⚠️ Chemical resistance limitation: Bronze Filled PTFE is not suitable for service with acids (HCl, H₂SO₄, HNO₃), oxidising media, chlorine, or seawater. The bronze particles corrode in these environments, causing the material to swell and lose mechanical integrity. For aggressive chemical service, use Glass-Filled PTFE or virgin PTFE instead.
Available Forms & Dimensions
Bronze Filled PTFE is supplied as standard stock shapes for in-house machining, or as finished components machined to your drawing. All forms are available in 40% and 60% bronze grades.
Bronze Filled PTFE Rod
For machining bushings, bearings & thrust rings
The most common stock form. Machined on a CNC lathe into bushings, flanged bearings, thrust washers, and piston rings. Straight-bore and flanged profiles are the most common finished shapes.
- Diameter: 10 mm to 200 mm (standard stock)
- Length: up to 300 mm per piece (standard)
- Longer blanks available on request
- Both 40% and 60% bronze in stock
Bronze Filled PTFE Sheet
For flat seals, thrust pads & wear plates
Cut into flat thrust washers, wear plates, and sealing pads. Also used for sliding bearing surfaces in guide rails and linear motion systems where a flat low-friction surface is required.
- Thickness: 3 mm to 100 mm
- Standard sheet size: 300 × 300 mm and 500 × 500 mm
- Custom dimensions cut to order
- Both 40% and 60% bronze available
Bronze Filled PTFE Tube
For thin-wall bushings & sleeve bearings
Pre-bored tube eliminates the inner-diameter roughing cut, reducing machining time for bushing production. Thicker wall tubes are used for press-fit sleeve bearings in pump housings and gearboxes.
- Outer diameter: 20 mm to 200 mm
- Wall thickness: 5 mm to 50 mm
- Length: up to 300 mm per piece
- 40% bronze grade standard; 60% on request
Custom Machined Components
Bushings, thrust washers, piston rings & more
Finished components machined to your drawing — no further machining needed on receipt. Common finished forms include straight bushings, flanged bushings, split bushings, thrust washers, piston rings, and valve seats.
- Tolerances: ±0.05 mm standard; tighter on request
- Drawing formats accepted: DXF, PDF, STP
- Material test certificate with every batch
- Both 40% and 60% bronze available
Standard Dimensions
Rod Diameter
10 – 200
millimetres
Sheet Thickness
3 – 100
millimetres
Dimensional Tolerance
±0.05
mm standard | tighter on request
Custom sizes and finished parts: Non-standard diameters, lengths beyond 300 mm, and complex profiles are available on order. Send your drawing or part number via our contact form for a quote and lead time.
Technical Specifications – Bronze Filled PTFE
Mechanical Properties
Thermal Properties
Chemical Resistance Summary
Applications of Bronze Filled PTFE
Bronze Filled PTFE is used wherever a component must carry a high mechanical load, operate dry or with minimal lubrication, and transfer heat away from the sliding surface. These are the primary application areas.
Hydraulic & Pneumatic Systems
Piston rings, rod seals, and guide rings in hydraulic cylinders. Handles high contact pressure and operates dry between stroke cycles without galling on the cylinder bore.
Pumps & Compressors
Sleeve bearings, thrust washers, and wear rings in pump housings. The high PV rating (0.10 MPa·m/s) and thermal conductivity handle the heat generated at high shaft speeds.
Automotive
Gearbox bushings, suspension pivot bearings, and steering column bearings. Operates dry, resists engine oils and transmission fluids, and reduces NVH (noise, vibration, harshness).
Aerospace & Defence
Actuation system bushings, control surface bearings, and landing gear pivot liners. Certified material grades available; operates across the full thermal range of aircraft environments.
Heavy Industrial Machinery
Bridge expansion bearings, crane slewing ring liners, and press tool guides. The 60% bronze grade carries structural loads that would crush virgin PTFE within hours.
General Engineering
Conveyor guide rails, linear slide bearings, and rotary table bushings in machinery where oil lubrication is impractical, undesirable, or a contamination risk.
Bronze Filled PTFE vs Other Filled PTFE Grades
Choosing the wrong PTFE grade for a bearing or sealing application is the most common cause of premature component failure. This table compares the four main filled PTFE grades across the properties that determine service life.
Not sure which grade suits your application? Contact Goa Polymer’s team with your operating conditions — load, speed, temperature, media — and we will confirm the right grade before you order.
Frequently Asked Questions — Bronze Filled PTFE
What is Bronze Filled PTFE and how is it made?
What is the difference between 40% and 60% bronze grade?
Can Bronze Filled PTFE be used in chemical service?
What is the maximum PV rating for Bronze Filled PTFE?
What finished components do you machine from Bronze Filled PTFE?
How does Bronze Filled PTFE compare to sintered bronze bearings?
What is the minimum order quantity?
There is no minimum order for standard rod, sheet, and tube sizes — we supply single pieces for prototyping and large production runs equally. For custom-machined finished components, a small batch quantity may be required depending on setup time. Contact us with your quantity and drawing for transparent pricing.
Why Choose Goa Polymer for Bronze Filled PTFE?
100%
ISO 9001:2015
Quality Assurance
40% and 60% bronze grades in rod, sheet, and tube — sintered and stocked at our Maharashtra facility. No lead time waiting for imported billets.
Finished bushings, thrust washers, and piston rings machined to your drawing. Dimensional verification on all finished parts before dispatch.
Full raw material traceability, in-process inspection, and batch records. Material test certificates supplied with every shipment on request.
Not sure if Bronze Filled PTFE suits your load and speed requirements? Share your application data and our team will confirm whether the material and grade are within their safe operating limits — before you order.
Direct manufacturer pricing with no distributor margin. Standard stock sizes dispatched within 3–7 working days. Volume pricing for OEM and annual supply agreements.
Explore Other PTFE Products
Best Carbon Filled PTFE
Bronze Filled PTFE
Expanded PTFE Gasket
Glass-Filled PTFE
Need Bronze Filled PTFE in Any Form or Grade?
Get a competitive quote from Goa Polymer — ISO 9001:2015 certified Bronze Filled PTFE manufacturer in Maharashtra, India. Standard rods, sheets & tubes in stock. Custom machined components to your drawing. 40% and 60% bronze grades available. PAN-India delivery in 3–7 working days.
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